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Infection in Oral & Maxillofacial Region Pandect Yu Chuang-Qi Infection--- in oral & maxillofacial region Infection Trait Arising Mutation Diagnosis Treatment Pandect Conception Anatomy Route Influence factors Principles Principles Infection---conception Infectious agent(bacteria) Host Inflammatory reaction protective and defensive Beneficial Elimination the infectious pathogen Repair tissue injury Harmful Hypersensitivity Autoimmune disease Trait of anatomy Oral and nasal cavity Tooth Space Blood and Lymphoid system Bacteria Trait of anatomy Bacteria---Exist Oral and nasal cavity Maxillary sinus(上颌窦) Temperature + Moisture (Beneficial) Reproduction + Developing Trait of anatomy Tooth Caries Alveolar bone Pulpitis Soft tissue Apical infection Fascial space Trait of anatomy Fascial space(间隙)---loose connective tissue Among skin, maxillary and muscle •Purulent--- spreading way •Do not exist in healthy state •Become filling during infection Trait of anatomy Blood and lymphoid system Beneficial Abundance Harmful Encephalic infection Dangerous triangle •Lacking valves •Cavernous sinus Cavernous sinus thrombosis Trait of pathogenic bacterium Flora(菌丛) Varied Numerous • Sterile • Simple • Complex Streptococcus hemolyticus (溶血性链球菌) Staphylococcus aureus (金黄色葡萄球菌) Escherichia coli (大肠杆菌) Anaerobe (厌氧菌) Route of infection Odontogenic infection Adenogenous(腺源性) infection Traumatic infection Hematogenous(血源性) infection Iatrogenic(医源性) infection Odontogenic infection • Periapical infection • Pericoronitis(冠周炎) Periapical infection Fistular(瘘) Cellulitis (蜂窝织炎) Intraoral soft tissue abscess (脓肿) Septicemia(败血症) Acute-chronic Periapical infection Deep fascial space infection Osteomyelitis Ascending facialcerebral infection (骨髓炎) Pathways of Periapical infection Pericoronitis (冠周炎) Lower third molar Infection---Arising Host--- defense system Microbe---virulence quantity Local circumstance Balance Imbalance Scale Mutation Influence factors Changing directions Influence factors Host--- defense system Microbe---virulence quantity Treatment strategy Changing directions Localization and recovery Acute Diffusion chronic Blood system---Septicemia lymphoid system---Lymphadenopathy From submandible space infection to chest region How to diagnose? Signs and Symptoms Local Signs and Symptoms Systemical Signs and Symptoms Local Signs and Symptoms Locally Pain Swelling Surface erythema Pus formation Limitation of motion Systemical Signs and Symptoms Fever Lymphadenopathy Malaise Toxic appearance Elevated white blood cell count How to treat? Acute stage Chronic stage Acute stage Host Antibiotic therapy Surgical drainage and incision Host Defense Mechanisms Migration of white blood cell Production of antibodies Critical Principles Most important factor --- final outcome The infections--- cured by the host, not by antibiotics Principles for choosing appropriate antibiotic Antibiotic era causative organism(致病菌) sensitivity specific, narrow-spectrum antibiotic least toxic antibiotic drug history(success, allergic and toxic) Principles of antibiotic administration Proper dose Proper time interval Proper route of administration(oral, parenteral) Combination antibiotic therapy Surgical drainage and incision How to judge the pus formation? Purposes of surgical drainage and incision Principles of surgical drainage and incision How to judge the pus formation? Characteristic Three stages Inoculation Cellulitis Abscess Duration--- >5 days Palpation---Fluctuant Appearance---Reddened Needle aspiration B-ultrasound CT Fluctuant examination Purposes of surgical drainage & incision Rid the body of toxic purulent material Decompress the tissues Allowing better perfusion of blood containing antibiotics and defensive elements Increased oxygenation of the infected area Infection in masseteric space Infection in multi-space Ludwig’s angina Principles of surgical drainage & incision Place the incision in an esthetically acceptable Place the incision in a dependent position to encourage drainage by gravity Dissect bluntly through deeper tissues and explore all portions of the abscess Place a drain and stabilize it with sutures Principles of surgical drainage & incision Chronic stage Surgical removal of the focus(病灶) Lesion tooth---Impacted tooth Osteomyelitis Conclusion Infection in oral & maxillo-facial region The trait of Infection Odontogenic infection mutation of infectious Diagnosis of the infection Diagnosis of the abscess formation The principles of the treatment Thank you